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Template: ssh/privsep_tell
Type: note
Description: Privilege separation
This version of OpenSSH contains the new privilege separation
option. This significantly reduces the quantity of code that runs as
root, and therefore reduces the impact of security holes in sshd.
.
Unfortunately, privilege separation interacts badly with PAM. Any
PAM session modules that need to run as root (pam_mkhomedir, for
example) will fail, and PAM keyboard-interactive authentication
won't work.
.
Privilege separation is turned on by default, so if you decide you
want it turned off, you need to add "UsePrivilegeSeparation no" to
/etc/ssh/sshd_config.
.
NB! If you are running a 2.0 series Linux kernel, then privilege
separation will not work at all, and your sshd will fail to start
unless you explicitly turn privilege separation off.
Template: ssh/privsep_ask
Type: boolean
Default: true
Description: Enable Privilege separation
This version of OpenSSH contains the new privilege separation
option. This significantly reduces the quantity of code that runs as
root, and therefore reduces the impact of security holes in sshd.
.
Unfortunately, privilege separation interacts badly with PAM. Any
PAM session modules that need to run as root (pam_mkhomedir, for
example) will fail, and PAM keyboard-interactive authentication
won't work.
.
Since you've opted to have me generate an sshd_config file for you,
you can choose whether or not to have Privilege Separation turned on
or not. Unless you are running 2.0 (in which case you *must* say no
here or your sshd won't start at all) or know you need to use PAM
features that won't work with this option, you should say yes here.
Template: ssh/new_config
Type: boolean
Default: true
Description: Generate new configuration file
This version of OpenSSH has a considerably changed configuration file from
the version shipped in Debian 'Potato', which you appear to be upgrading from.
I can now generate you a new configuration file (/etc/ssh/sshd.config), which
will work with the new server version, but will not contain any customisations
you made with the old version.
.
Please note that this new configuration file will set the value of
'PermitRootLogin' to yes (meaning that anyone knowing the root password can
ssh directly in as root). It is the opinion of the maintainer that this is
the correct default (see README.Debian for more details), but you can always
edit sshd_config and set it to no if you wish.
.
It is strongly recommended that you let me generate a new configuration file
for you.
Template: ssh/protocol2_only
Type: boolean
Default: true
Description: Allow SSH protocol 2 only
This version of OpenSSH supports version 2 of the ssh protocol, which
is much more secure. Disabling ssh 1 is encouraged, however this
will slow things down on low end machines and might prevent older
clients from connecting (the ssh client shipped with "potato" is affected).
.
Also please note that keys used for protocol 1 are different so you will
not be able to use them if you only allow protocol 2 connections.
.
If you later change your mind about this setting, README.Debian has
instructions on what to do to your sshd_config file.
Template: ssh/ssh2_keys_merged
Type: note
Description: ssh2 keys merged in configuration files
As of version 3 OpenSSH no longer uses separate files for ssh1 and
ssh2 keys. This means the authorized_keys2 and known_hosts2 files
are no longer needed. They will still be read in order to maintain
backwards compatibility
Template: ssh/use_old_init_script
Type: boolean
Default: false
Description: Do you want to continue (and risk killing active ssh sessions) ?
The version of /etc/init.d/ssh that you have installed, is likely to kill
all running sshd instances. If you are doing this upgrade via an ssh
session, that would be a Bad Thing(tm).
.
You can fix this by adding "--pidfile /var/run/sshd.pid" to the
start-stop-daemon line in the stop section of the file.
Template: ssh/forward_warning
Type: note
Description: NOTE: Forwarding of X11 and Authorization disabled by default.
For security reasons, the Debian version of ssh has ForwardX11 and
ForwardAgent set to ``off'' by default.
.
You can enable it for servers you trust, either
in one of the configuration files, or with the -X command line option.
.
More details can be found in /usr/share/doc/ssh/README.Debian
Template: ssh/insecure_rshd
Type: note
Description: Warning: rsh-server is installed --- probably not a good idea
having rsh-server installed undermines the security that you were probably
wanting to obtain by installing ssh. I'd advise you to remove that package.
Template: ssh/insecure_telnetd
Type: note
Description: Warning: telnetd is installed --- probably not a good idea
I'd advise you to either remove the telnetd package (if you don't actually
need to offer telnet access) or install telnetd-ssl so that there is at
least some chance that telnet sessions will not be sending unencrypted
login/password and session information over the network.
Template: ssh/encrypted_host_key_but_no_keygen
Type: note
Description: Warning: you must create a new host key
There is an old /etc/ssh/ssh_host_key, which is IDEA encrypted.
OpenSSH can not handle this host key file, and I can't find the
ssh-keygen utility from the old (non-free) SSH installation.
.
You will need to generate a new host key.
Template: ssh/SUID_client
Type: boolean
Default: true
Description: Do you want /usr/lib/ssh-keysign to be installed SUID root?
You have the option of installing the ssh-keysign helper with the SUID
bit set.
.
If you make ssh-keysign SUID, you will be able to use SSH's Protocol 2
host-based authentication.
.
If in doubt, I suggest you install it with SUID. If it causes
problems you can change your mind later by running: dpkg-reconfigure ssh
Template: ssh/run_sshd
Type: boolean
Default: true
Description: Do you want to run the sshd server ?
This package contains both the ssh client, and the sshd server.
.
Normally the sshd Secure Shell Server will be run to allow remote
logins via ssh.
.
If you are only interested in using the ssh client for outbound
connections on this machine, and don't want to log into it at all
using ssh, then you can disable sshd here.
Template: ssh/user_environment_tell
Type: note
Description: Environment options on keys have been deprecated
This version of OpenSSH disables the environment option for public keys by
default, in order to avoid certain attacks (for example, LD_PRELOAD). If
you are using this option in an authorized_keys file, beware that the keys
in question will no longer work until the option is removed.
.
To re-enable this option, set "PermitUserEnvironment yes" in
/etc/ssh/sshd_config after the upgrade is complete, taking note of the
warning in the sshd_config(5) manual page.
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